Question: In order to assess the possible relationship between sales and type sales media employed, a marketing firm selects Newspaper (N), Magazine (M). and Direct Mail (D) at random each month using the same sales script (there are no seasonalities in this product's sales). The resultant sales are then disaggregated into the three levels High (HI), Medium (MED), and Low (LO). If after completion of 300 advertisements the results tabulated below are found, test the hypothesis at the 10% sig. level that advertising medium and sales level are statistically independent (clearly indicate all the steps of your analysis, including assumptions).

ADVERTISING MEDIUM

LEVEL HI 36 26 31

OF MED 35 42 29

SALES LO 23 38 40